The Citroen C4 X 1.2 (136 Hp) Mild Hybrid e-DSC, introduced in January 2024 and produced through October 2024, represents a unique offering within the C4 X range. Positioned as a mid-range option, this variant blends a compact, efficient gasoline engine with mild hybrid technology, aiming to deliver a balance of performance and fuel economy. The C4 X itself is a distinctive vehicle, blending elements of a traditional sedan with the elevated ride height and practicality of a crossover, marketed primarily in Europe as an alternative to conventional compact cars and SUVs. It’s built on the Stellantis EMP2 platform, shared with other Peugeot and Opel/Vauxhall models.
Technical Specifications
| Brand | Citroen |
| Model | C4 X |
| Generation | C4 X (Phase I, 2022) |
| Type (Engine) | 1.2 (136 Hp) Mild Hybrid e-DSC |
| Start of production | January, 2024 |
| End of production | October, 2024 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | SUV, Crossover, Fastback |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption at Low speed (WLTP) | 4.3-4.4 l/100 km (54.7 – 53.5 US mpg) |
| Fuel consumption at Medium speed (WLTP) | 4.2-4.3 l/100 km (56 – 54.7 US mpg) |
| Fuel consumption at high speed (WLTP) | 4.3 l/100 km (54.7 US mpg) |
| Fuel consumption at very high speed (WLTP) | 5.4-5.5 l/100 km (43.6 – 42.8 US mpg) |
| Combined fuel consumption (WLTP) | 4.7 l/100 km (50 US mpg) |
| CO2 emissions (WLTP) | 105-107 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.1 sec |
| Acceleration 0 – 62 mph | 8.1 sec |
| Acceleration 0 – 60 mph | 7.7 sec |
| Maximum speed | 206 km/h (128 mph) |
| Emission standard | Euro 6e |
| Weight-to-power ratio | 9.8 kg/Hp |
| Weight-to-torque ratio | 5.8 kg/Nm |
| Gross battery capacity | 0.89 kWh |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Electric motor power | 21 Hp @ 4264 rpm |
| Electric motor Torque | 51 Nm (37.62 lb.-ft.) |
| Electric motor location | Integrated into the transmission |
| Electric motor type | Synchronous |
| Power | 136 Hp @ 5500 rpm |
| Torque | 230 Nm @ 1750 rpm (169.64 lb.-ft. @ 1750 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | HN09 |
| Engine displacement | 1199 cm3 (73.17 cu. in.) |
| Number of cylinders | 3 |
| Engine configuration | Inline |
| Cylinder Bore | 75 mm (2.95 in.) |
| Piston Stroke | 90.5 mm (3.56 in.) |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 3.5 l (3.7 US qt | 3.08 UK qt) |
| Kerb Weight | 1336-1399 kg (2945.38 – 3084.27 lbs.) |
| Max. weight | 1800 kg (3968.32 lbs.) |
| Max load | 401-464 kg (884.05 – 1022.94 lbs.) |
| Trunk (boot) space – minimum | 510 l (18.01 cu. ft.) |
| Permitted trailer load with brakes (12%) | 1100 kg (2425.08 lbs.) |
| Permitted trailer load without brakes | 705 kg (1554.26 lbs.) |
| Permitted towbar download | 61 kg (134.48 lbs.) |
| Length | 4600 mm (181.1 in.) |
| Width | 1834 mm (72.2 in.) |
| Width including mirrors | 2032 mm (80 in.) |
| Height | 1515-1525 mm (59.65 – 60.04 in.) |
| Wheelbase | 2670 mm (105.12 in.) |
| Front track | 1545-1560 mm (60.83 – 61.42 in.) |
| Rear (Back) track | 1545-1560 mm (60.83 – 61.42 in.) |
| Front overhang | 880 mm (34.65 in.) |
| Rear overhang | 1050 mm (41.34 in.) |
| Ride height (ground clearance) | 156 mm (6.14 in.) |
| Drivetrain Architecture | Front wheel drive. MHEV. ICE and electric motor drive front wheels. |
| Drive wheel | Front wheel drive |
| Number of gears and type of gearbox | 6 gears, automatic transmission e-DSC |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Tires size | 195/60 R18 96H |
| Wheel rims size | 18 |
Powertrain & Engine Architecture
At the heart of the C4 X 1.2 Mild Hybrid e-DSC lies the HN09 engine, a 1.2-liter, three-cylinder turbocharged gasoline engine. This engine is part of Citroen’s PureTech family, known for its compact size and efficiency. The engine utilizes direct fuel injection and a single scroll turbocharger to deliver 136 horsepower at 5500 rpm and 230 Nm (169.64 lb-ft) of torque at 1750 rpm. The ‘e-DSC’ designation indicates the inclusion of a 48-volt mild hybrid system. This system comprises a small electric motor (21 hp and 51 Nm of torque) integrated with the transmission and a 0.89 kWh lithium-ion battery. The mild hybrid system doesn’t allow for fully electric driving but provides assistance during acceleration, regenerative braking to recapture energy, and enables a smoother start-stop function. The transmission is a six-speed automatic, specifically tuned to work in conjunction with the mild hybrid system for optimized fuel efficiency.
Driving Characteristics
The 1.2-liter engine, paired with the automatic transmission, delivers adequate performance for everyday driving. Acceleration from 0 to 100 km/h (0-62 mph) takes approximately 8.1 seconds. While not particularly sporty, the powertrain provides sufficient power for highway cruising and overtaking maneuvers. The mild hybrid system contributes to a responsive feel during initial acceleration, filling in torque gaps from the turbocharger. Compared to higher-output versions of the C4 X, such as those with more powerful gasoline engines, this variant prioritizes fuel economy over outright performance. The automatic transmission offers smooth gear changes, but may occasionally feel hesitant during quick downshifts. The overall driving experience is comfortable and refined, typical of Citroen’s focus on ride quality.
Equipment & Trim Levels
The C4 X 1.2 Mild Hybrid e-DSC typically came equipped with a respectable level of standard features. These included automatic climate control, a touchscreen infotainment system with Apple CarPlay and Android Auto compatibility, rear parking sensors, and a suite of safety features such as lane departure warning and automatic emergency braking. Interior upholstery was generally cloth, with options for upgraded materials available. Higher trim levels offered additional features like a larger touchscreen, a digital instrument cluster, and advanced driver-assistance systems. Optional extras included a panoramic sunroof, premium audio system, and adaptive cruise control.
Chassis & Braking
The C4 X utilizes a conventional suspension setup, with MacPherson struts at the front and a torsion beam axle at the rear. The suspension is tuned for comfort, providing a smooth ride over various road surfaces. Braking duties are handled by ventilated discs at the front and solid discs at the rear. The car is equipped with ABS (Anti-lock Braking System), electronic brake-force distribution, and emergency brake assist. Steering is provided by an electric power steering system, offering light and precise control.
Market Reception & Comparison
The Citroen C4 X 1.2 Mild Hybrid e-DSC was generally well-received by critics for its fuel efficiency and comfortable ride. However, some reviewers noted that the engine could feel strained under heavy load, and the performance wasn’t as engaging as some competitors. Compared to other C4 X variants, the 1.2-liter engine offered the best fuel economy, making it an attractive option for drivers prioritizing efficiency. It positioned itself as a practical and economical choice within the C4 X lineup, appealing to buyers seeking a comfortable and fuel-efficient vehicle for daily commuting and long-distance travel.
Legacy
The Citroen C4 X, and specifically the 1.2 Mild Hybrid e-DSC variant, represents a step towards electrification and improved fuel efficiency within Citroen’s model range. While relatively new to the market, the HN09 engine has proven to be generally reliable, although long-term durability of the mild hybrid components remains to be fully assessed. On the used car market, these models are likely to appeal to buyers seeking a fuel-efficient and comfortable vehicle with modern features. The combination of a compact engine, mild hybrid technology, and a comfortable chassis makes the C4 X 1.2 Mild Hybrid e-DSC a compelling option in the compact car segment.
